Wire stripper



Jan. 5,1954 E. 1E ET AL 2,664,769

IIIIIIIIII ER Fi 11111 11111111 o- Patentec Jan. 5, 1954 UNITED STATES PATENT OFFICE WIRE STRIPPER Application September 12, 1950, Serial No. 184,510

(Granted under Title 35, U. S. Code (1952),

sec. 266) 1 Claim.

The invention desoribed herein may be manufactured and used by or for the Government for govei*nmental purposes, without the payment of any royalty thereon.

The present invention relates to a wire stripper, and more particularly to a wire stripper adapted for removing any desired length of insulation from a covered wire conductor.

Among electricai workers there is a continuai need for removing the insulation from covered Wire conductors where it is desired to make nevv electrical connections.

The removal of the insu1ation is usually accomplished by cutting into the insulation and removing that portion of the insulation by a pair of p1iers or some other cutting too1. Other types of devices for removing insuiation have been designed, incorporating in such devices a sharp cutting edge, such as a knife, which cuts the insulation and thereaiter the insulation is removed by conventional means. It has been found that employment of such devises, oiten results in damage by cutting or marring the wire conductor.

It is, therefore, an object of the present invention to provide a stripping tool which will readily remove any length of insulation of insulated cable Without the possibility of causing damage to the. Wire conductor.

Another object or the invention is to provide a tool which Will remove the insulation in one operation, that is, that Will out the insulation and in the same operation permit ready and easy removal of the same.

In the accompanying drawing there is shown one embodiment of the invention, wherein Figure 1 is a view in perspective of the insulation removal means mounted upon a pair of handles, or other supporting means, which are not completely shown.

Figure 2 is a crosssectional view of the end of the device taken on the line 2-2 of Figure 3; and,

Figure 3 is a sectional view of the device taken on the line 3-3 of Figure 2.

Referring particulariy t Figure 1, a pair of handles H, i3 are shown which serve as a supporting means for the wire stripping device hareinafter more fuiiy described. The handles Il, 13 may be the conventional crossed lever arms of a pair of pliers such as are commonly used by electricians. However, the wire stripping device may be mounted upon any pair of handles joined or 1inked so as to provide a supporting means for the opposing block members of the wire stripper. The vvire stripper comprises essentiaily a pair of mutually opposing block members i5, li; member I5 serving as a male member and block l7 serving as a female member. Screws i9 serve as a means for securing block members i5, i7 to the handles il, I3 respectiveiy. Block i5 1s provided With chamfered surfaces 21 and 23, and a semi-circular groove 25 which extends from the inner end of the block to a point slight1y short or the other end of said block, at which point a lip 27 is formed having a semi-cylindrical bore smaller than that of the groove 25. The female block member Ii is similar1y provided wth inwardly converging bevelied surfaces 29 and 3i which, when the wire stripping tool is in opera tive position, are in abuttment with the cham iered surfaces 23 and 21, respectively, of the biock member l5. Block ll is also provided with a longitudinally disposed arcuate groove 33 which is located at the base of the recess formed by the converging beveiled surfaces 29, 3l. The groove 33 does not extend the full length of the block but terminates in a lip portion 35 having a semi-cylindrical bore smaller than that oi groove 33.

The groove 33 and lip portion 35 of block are in opposition, respectively, to groove 25 and lip 21 of block l5. Accordingly, when blocks i5 and li are drawn together, there is formed a cylindrical channe] formed of the opposing grooves 25 and 33 and a more restricted or smailer channel formed between the opposing lip portions 21 and 35.

In operation, the cable of which the insulation is to be removed is placed betvveen the blocks iii, 11 and the handles Il, la are drawn toward each other. The cable then extends between the lip portions 27, 35 and into the cylindrical channel formed by the opposing grooves 25 and 33. Slight pressure exerted upon the handles Wi1l enable the iips 27, 35 to out the insuiation, at which time the tool is pulled and effectiveiy removes that portion of the insu1ation contained within the channel and any portion of the insuiation extending beyond the tool.

While there has been shown in the drawing and there has been described in detail a preferred form of the invention, it Wi11 be understood that it is not thereby intended to limit it to the. specific application disclosed, but it is aimed to cover ail modifications and alternative constructions falling within the scope of the invention as expressed in the claim.

What is claimed is:

A stripper for removing the insulatien from a covered wire conductor, comprising a pair of mutually opposing blocks, means for support ing said blocks, and means for securing said blockg to said s upporting means, the sides of first of said blocks being chamfered to form a sub stantially trangular wedge, the second of sad bocks recessed to accommodace the sad triangular wedge 01 said first black, said first bloc}: hav.. ing a longitudinally disposed groove in the vertex of said triangular Wedge and terminatjng in a dependng lip portion having an arcuate bore smaller than that of said groove, said second b1ock having a groove in the base of saidreessed portion and terminating in a depending 1ip portien having an arcuate bore sma ller than fuhat of said last mentioned groove, whereby when said blocks are in engagement, the grooves in sad 4 first and second blocks form a circular channel uI a diameter greater than that of the circular groove formed by the opposing 1ip portions.

ELWOOD RENNIE. JAMES H. HYDE, Executor of the last wzlZ and testament of Wil- Z i q m W. Hyde, deceased.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,019,835 P1ack Max. 12, 1912 1,388,398 Adam5y Aug. :23, 1921 1,578,340 Miner Mer. 30, 1926 1,699,805 Ocko Jan. 22, 1929 

